Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 702 · 40 questions

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

1. 1.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
4. 4.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
5. 5.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) turmeric powder (d) a battery cell
7. 7.🫧 Which of these is neutral? (a) vinegar (b) soap solution (c) plain water (d) detergent water
8. 8.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) detergent water (c) soap solution (d) baking soda water
9. 9.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) turmeric powder (d) a mirror
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) turmeric powder (d) yeast
11. 11.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
12. 12.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
13. 13.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
14. 14.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
15. 15.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) an indicator (d) a magnet
16. 16.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
17. 17.🫧 Which of these is an acid? (a) detergent water (b) curd (c) plain water (d) soap solution
18. 18.🔍 Which is the odd one out? (a) vinegar (b) soap solution (c) sugar water (d) tamarind water
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
20. 20.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) plain water
22. 22.True or false: sugar water is neutral. (a) True (b) False
23. 23.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
24. 24.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
28. 28.True or false: vinegar is a base. (a) True (b) False
29. 29.True or false: soap solution is neutral. (a) False (b) True
30. 30.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
31. 31.🔍 Which is the odd one out? (a) lemon juice (b) sugar water (c) baking soda water (d) vinegar
32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a magnet (c) water (d) turmeric powder
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
34. 34.True or false: tamarind water is an acid. (a) False (b) True
35. 35.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
36. 36.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
37. 37.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) soap solution (c) lemon juice (d) a battery cell
38. 38.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
39. 39.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
40. 40.True or false: sugar water is an acid. (a) False (b) True

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